Tower body service life evaluation method and twinborn monitoring system

Abstract

The invention provides a tower body service life evaluation method and a twin monitoring system, the system comprises a vehicle equipment end, a server and a client, and the vehicle equipment end is used for sending tower body label combination information and vehicle real-time working condition data to the server; the server comprises a model library and reconstruction module which is used for building a tower crane 3D twinborn model; the strength calculation module is used for calculating the load and strength borne by the standard knot in real time; the label marking and recording module is used for establishing a corresponding relation between tower body standard knot labels and standard knots in the tower crane 3D twin model and storing related information of the standard knots; the service life prediction module is used for predicting the residual service life of the standard knot; and the client is used for displaying tower crane 3D twin model actions and historical information of each standard knot. According to the method, the residual life of the standard knot is predicted based on the historical stress data in the use process of the standard knot, the risk that the short-life and unsafe standard knot is installed at the maximum stress position is effectively avoided, and the overall safety and stability of the tower body are improved.

Description

Technical Field

[0001] The invention discloses a tower body life assessment method and a twin monitoring system, belonging to the technical field of tower crane safety monitoring. Background Art

[0002] During the construction of tower cranes, the standard section of the tower body is the core component supporting the entire tower crane, and its safety is of vital importance. When the tower body is working, the standard section at the bottom of the tower body often bears a larger load, while the load borne by the standard section at the top of the tower body is much smaller than that of the bottom standard section. With long-term use, there are differences in the damage and remaining life of each standard section of the tower body. After long-term use of the tower body, the loads borne by each standard section are not recorded and managed accordingly, and it is impossible to conduct an effective and accurate safety assessment of the current state of the standard section, identify the differences in the remaining life of each standard section, and avoid placing the more damaged standard section at the bottom of the tower body with a larger load, which poses a major safety hazard. Summary of the invention

[0003] The purpose of the present invention is to provide a tower body life assessment method and a twin monitoring system. By acquiring actual vehicle operating condition information, a 3D twin model of a tower crane is established, and real-time strength calculations are performed on each standard section during the construction process. At the same time, the real-time calculation results are synchronously recorded and managed based on the factory labels of the tower body standard sections, so as to predict the remaining life and conduct safety analysis on each standard section.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] The present invention provides a tower body life assessment method, comprising:

[0006] A tower body label database is established based on the factory labels of the tower body standard sections to store the stress data of each standard section during use;

[0007] After the tower body is assembled, the factory labels of the tower body standard sections are scanned to identify the label numbers corresponding to the standard sections at different positions, and the tower body assembly sequence is obtained;

[0008] During the use of the tower body, the stress of the standard nodes at different positions is calculated in real time, and the stress value of the standard node is stored in the standard node corresponding to the tower body tag database based on the tower body assembly sequence;

[0009] Based on the historical load data of each standard section in the tower body tag database, the remaining life of each standard section is evaluated.

[0010] Preferably, the method further comprises:

[0011] Each time the tower body standard section changes, the factory label of the tower body standard section is rescanned to obtain the tower body assembly sequence, and the calculated standard section stress value is stored in the standard section corresponding to the tower body label database based on the latest tower body assembly sequence.

[0012] Preferably, the tower body label database stores data using the original label number of each standard node as one page, the first column of each page is the number of calculations, and the second column is the standard node stress.

[0013] Preferably, the storage method of the standard node stress in the tower body label database is:

[0014] Initially, the default number of calculations for each row is C ni =1, when calculating for the first time, the stress calculation result is stored in the first row and second column as M ni ;

[0015] During the next calculation, the current stress calculation result is compared with the latest stored stress result to calculate:

[0016] ,

[0017] If the calculated value is less than 2%, no separate row is recorded, and only the calculation times of the row where the latest stress storage result is located are added by 1, and the stress storage value remains unchanged;

[0018] Otherwise, record in the next line the number of calculations and the result of this stress calculation, and so on;

[0019] Where n represents the original label number of the standard section, i represents the i-th row, C ni Indicates the number of calculations for the i-th row of standard section n, M ni Represents the stress data stored in the i-th row of standard node n.

[0020] Preferably, the remaining life of each standard section is evaluated based on the historical load data of each standard section in the tower body tag database, including:

[0021] Obtain all stress data calculated during the use of a single standard section from the tower body tag database;

[0022] For each stress data, query from the pre-configured stress and life correspondence table, and calculate the standard section life value corresponding to the stress by linear interpolation; and obtain the life usage percentage by dividing the service time under the stress by the standard section life value under the stress obtained by looking up the table;

[0023] Calculate the life usage percentage of a single standard section under all stresses calculated during use, and add up the total life usage percentage of the single standard section, which is recorded as the total damage;

[0024] The life under the safe allowable stress is obtained from the stress-life correspondence table, which is defined as the equivalent total life of the standard section. The total damage is multiplied by the equivalent total life of the standard section to obtain the converted service life of the standard section.

[0025] The remaining life of the standard section is obtained by subtracting the converted used time of the standard section from the equivalent total life of the standard section.

[0026] Preferably, the stress-life correspondence table is obtained from tower crane design standards;

[0027] In the stress-life correspondence table, the horizontal axis is the stress value, and the vertical axis is the total life of the standard section under the stress.

[0028] Preferably, the calculation method of the usage time under stress is:

[0029] In the real-time stress calculation process, the single data transmission time is multiplied by the number of calculations corresponding to the stress in the tower body tag database to obtain the usage time under the stress.

[0030] The present invention also provides a tower body life assessment twin monitoring system for implementing the tower body life assessment method. The system comprises: a vehicle equipment end, a server and a client.

[0031] The vehicle equipment end is used to send tower body related data to the server, wherein the tower body related data includes tower body label combination information and vehicle real-time working condition data;

[0032] The server comprises:

[0033] The model library and reconstruction module is used to build a 3D twin model of the tower crane and drive the real-time movement of the 3D twin model of the tower crane based on the real-time working condition data sent by the vehicle equipment end to realize the tower crane movement;

[0034] Strength calculation module, used to calculate the total load on the upper part of the tower in real time, as well as the real-time load and stress borne by each standard section under the current working conditions;

[0035] The label marking and recording module is used to establish the corresponding relationship between the tower body standard section label and the standard section in the tower crane 3D twin model, and store the standard section stress data;

[0036] The life prediction module is used to predict the remaining life of the standard section based on the historical load data of the standard section;

[0037] The client is used to display the movements of the 3D twin model of the tower crane and the historical information of each standard section of the tower body.

[0038] Preferably, the tower body label combination information is a tower body assembly sequence during the use of the tower crane, and the tower body assembly sequence means that after the tower body is assembled, the factory labels of the tower body standard sections are scanned to identify the label numbers corresponding to the standard sections at different positions to obtain the tower body assembly sequence;

[0039] The real-time working condition data of the vehicle include lifting load, lifting arm length, boom amplitude, rotation angle and wind speed data.

[0040] Preferably, the model library and reconstruction module include:

[0041] Tower crane equipment model library, including 3D visualized tower crane equipment models of different tonnages. A single equipment model consists of motion mechanism parts and a 3D model of the body.

[0042] The 3D model reconstruction submodule is used to reconstruct the tower crane equipment model according to the real-time operating condition data of the vehicle sent by the vehicle equipment end, complete the reorganization and assembly of the tower crane equipment model, and obtain the 3D twin model of the tower crane; and drive the real-time movement of the 3D twin model of the tower crane based on the real-time operating condition data sent by the vehicle equipment end.

[0043] Preferably, the intensity calculation module is specifically used to:

[0044] Calculate the total load on the upper part of the tower body based on the real-time vehicle working condition data sent by the vehicle equipment end, including the hoisting weight, upper tipping bending moment and wind bending moment;

[0045] Based on the tower body calculation data, tower body structure data and real-time working condition data, the real-time load and stress borne by each standard section under the current working condition are calculated.

[0046] Preferably, the label marking and recording module includes:

[0047] The label marking submodule is used to establish a matching relationship between the label of the physical tower body standard section and the standard section of the tower crane 3D twin model, and identify the position of the standard section in the tower crane 3D twin model corresponding to each label;

[0048] The label database is used to record and store the stress calculation times and stress data corresponding to each standard section label.

[0049] Preferably, the life prediction module is specifically used to:

[0050] Obtain all stress data calculated during the use of a single standard section from the tower body tag database;

[0051] For each stress data, query from the pre-configured stress and life correspondence table, and calculate the standard section life value corresponding to the stress by linear interpolation; and obtain the life usage percentage by dividing the service time under the stress by the standard section life value under the stress obtained by looking up the table;

[0052] Calculate the life usage percentage of a single standard section under all stresses calculated during use, and add up the total life usage percentage of the single standard section, which is recorded as the total damage;

[0053] The life under the safe allowable stress is obtained from the stress-life correspondence table, which is defined as the equivalent total life of the standard section. The total damage is multiplied by the equivalent total life of the standard section to obtain the converted service life of the standard section.

[0054] The remaining life of the standard section is obtained by subtracting the converted used time of the standard section from the equivalent total life of the standard section.

[0055] Preferably, the client comprises:

[0056] Model-driven display, used to display the actions of the tower crane 3D twin model in real time;

[0057] Historical data display is used to show the usage times and load bearing data of each standard section of the tower body in the historical time period.

[0058] The beneficial effects brought by the technical solution of the present invention are as follows:

[0059] (1) The present invention provides a tower body life assessment method and a twin monitoring system. By acquiring actual vehicle operating condition information, a 3D twin model of a tower crane is established. During the construction process, loads are recorded in real time based on tower body standard section labels, so as to predict the remaining life and safety of the standard section and improve the overall safety and stability of the tower body.

[0060] (2) The present invention establishes the physical and motion mapping of the real tower crane through the model library and reconstruction module, realizes the real-time driving of the 3D twin model of the tower crane, and the client can view the working condition and status of the equipment.

[0061] (3) The present invention can perform real-time strength calculation on each standard node through the strength calculation module, and the client can issue a real-time warning to achieve real-time safety verification.

[0062] (4) The present invention establishes a matching relationship between the label of the physical tower body and the standard section of the tower crane 3D twin model through the label marking and recording module, records the load and bearing strength data of the standard section corresponding to each label, and can perform effective and accurate safety assessment of the status of each standard section.

[0063] (5) The present invention provides life assessment criteria through a life prediction module, performs safety status assessment and life prediction on each current standard section, and provides an optimal solution for the entire working condition combination of the tower body. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 A schematic diagram of a tower body life assessment method based on tag data collection provided by an embodiment of the present invention;

[0065] Figure 2 A schematic diagram of the deployment of a tower life assessment twin monitoring system provided by an embodiment of the present invention;

[0066] Figure 3 A schematic diagram of the deployment of functional modules on the server side in the tower life assessment twin monitoring system provided by an embodiment of the present invention;

[0067] Figure 4 A schematic diagram of the data storage rules of the tower body label library provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0069] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0070] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0071] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection with an intermediate.

[0072] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0073] It should be emphasized here that the step marks mentioned below are not intended to limit the order of the steps, but it should be understood that the steps can be executed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be executed simultaneously.

[0074] The first embodiment of the present invention provides a tower body life assessment method, which establishes a tower body label database based on the factory labels of the tower body standard sections. During the use of the tower body, the tower body assembly label sequence is scanned to collect and store the corresponding standard section data. Combined with the historical load data of each standard section in the label database, the remaining life of each standard section is predicted and safety analysis is performed. Figure 1 , the method comprising:

[0075] (1) A tower body label database is established based on the factory labels of the tower body standard sections to store the stress data of each standard section during use. It should be noted that each standard section of the tower body has a unique corresponding label number.

[0076] (2) After the tower body is assembled, the factory labels of the tower body standard sections are scanned to identify the label numbers corresponding to the standard sections at different positions and obtain the tower body assembly sequence.

[0077] (3) During the use of the tower body, the stress conditions of each standard section at different positions are calculated in real time, and the stress values ​​of the corresponding standard sections are stored in the corresponding standard sections in the label database based on the tower body assembly sequence.

[0078] (4) Every time the tower boom section changes (such as adding a boom section, reassembling, etc.), the factory label of the tower standard section is rescanned to obtain the tower assembly sequence, and then the real-time calculated standard section stress is stored in the corresponding standard section label column.

[0079] (5) Based on the historical load data of each standard section in the tower body tag database, the remaining life of each standard section is evaluated.

[0080] In the embodiment of the present invention, the tower body label database stores data with the original label number of each standard section as one page. Figure 4 , the data storage rules are as follows:

[0081] The first column on each page is the number of calculations C ni The second column is the arm stress M ni . Initially, by default, if data is stored for each row, the number of calculations is C ni =1. Store the stress calculation result as M ni ;

[0082] The next time you calculate, compare the stress calculation results with the latest stored stress results and calculate:

[0083] ,

[0084] If the calculated value is less than 2%, in order to reduce the amount of data storage, no separate row is recorded, and only the calculation times of the row where the latest stress storage result is located are superimposed by 1, that is, let C ni =C ni+1, stress value M ni constant;

[0085] Otherwise save C on the next line ni And the stress calculation results of this time, and so on. It should be noted that the initial number of calculations is 1.

[0086] Where n represents the original label number of the standard section; i represents the i-th row, i.e., the i-th stress storage data; C ni Indicates the number of times the stress data of the i-th row of the standard section n is calculated; M ni Represents the stress data stored in the i-th row of standard node n.

[0087] It should be noted that the data for the above-mentioned stress calculation comes from the data transmitted by the actual vehicle (or prototype vehicle) at a frequency of once every 10 seconds, and a stress calculation and verification is performed immediately after each data acquisition.

[0088] In the embodiment of the present invention, based on the historical load data of each standard section in the tower body tag database, the remaining life of each standard section is evaluated. The specific implementation process is as follows:

[0089] S1. A stress-life correspondence table is pre-configured, with the horizontal axis being the stress value and the vertical axis being the total life (usable time) of the standard section under the stress. It should be noted that the stress-life correspondence table is obtained from the tower crane design standard and is related to the tower crane use grade. The curve in the table is a segmented polyline.

[0090] S2. After obtaining the stress of a single tower body standard section and the service life under the stress, query the stress-life correspondence table, and calculate the corresponding life value of the standard section under the current stress through linear interpolation. Then, divide the service life by the life value under the stress to obtain the proportion (percentage) of the life used.

[0091] S3. The life usage percentages of all calculated stresses during the entire use of the standard section are accumulated and finally the total life usage percentage is accumulated, which can be understood as the total damage.

[0092] S4. Query the stress and life correspondence table to obtain the standard section life (usable time) under the safe allowable stress, which is defined as the equivalent total life of the standard section. Multiply the total damage by the equivalent total life of the standard section to get the converted used time of the standard section. Finally, subtract the converted used time of the standard section from the equivalent total life of the standard section to get the remaining life of the standard section of the tower body.

[0093] It should be noted that the safe allowable stress of the standard section will be determined when the tower body leaves the factory. Through the design specifications and the use level of the equipment design (the level defaults to level 4, otherwise it is obtained by mandatory user requirements), a table lookup is performed to obtain the service life under the allowable stress, and the corresponding relationship is stored in the life and stress correspondence table, which is also stored in the system.

[0094] Based on the above method, a certain standard section is used as an example for life assessment. Assuming that the factory label numbers of the tower body are A, B, C, ..., X, now the life assessment of the A standard section is performed, that is, n=A. The life assessment process is as follows:

[0095] Step 1: Retrieve the calculation times C of standard section A in the historical time from the tower body tag database Ai and stress M ni data.

[0096] Step 2: According to the stress and life correspondence table in the system, the standard section life value S corresponding to different stresses can be obtained Ai , assuming that the data corresponds to the following Table 1,

[0097] Table 1 Life value table of standard joints under different stresses

[0098] <![CDATA[Calculation times C Ai > <![CDATA[Arm joint stress value M ni > <![CDATA[Stress corresponding life value S Ai (unit: h)]]> <![CDATA[C A1 ]]> <![CDATA[M A1 ]]> <![CDATA[S A1 ]]> <![CDATA[C A2 ]]> <![CDATA[M A2 ]]> <![CDATA[S A2 ]]> <![CDATA[C A3 ]]> <![CDATA[M A3 ]]> <![CDATA[S A3 ]]> … … …

[0099] Step 3: Calculate the total damage of standard section A:

[0100] .

[0101] Step 4: According to the stress and life correspondence table in the system, obtain the equivalent total life time S of the standard section under the safety allowable stress of the standard section A under the required stress A , the remaining life of the tower standard section A is calculated and evaluated as:

[0102] ZS_A=S A -S A *YS_A.

[0103] The second embodiment of the present invention provides a tower life assessment twin monitoring system, which establishes a 3D twin model of the tower crane by acquiring actual vehicle operating condition information, and records the load in real time based on the tower standard section labels during the construction process, so as to predict the remaining life of the standard section. Figure 2 The system includes a vehicle device, a server, and a client, wherein:

[0104] The vehicle equipment side covers the entire working state of the tower crane, and has the function of sending data to the server. The sent data consists of two parts: tower body label combination information and vehicle real-time working condition data. The tower body label combination information is the tower body assembly sequence during the tower crane construction process, which automatically matches the tower body factory label to prepare for the subsequent standard section data recording and storage; the vehicle real-time working condition data includes real-time data such as lifting load, boom length, amplitude change, rotation angle, wind speed, etc.

[0105] The server plays the role of data transfer, calculation, update and storage, see Figure 3 The server includes a model library and reconstruction module, a strength calculation module, a label marking and recording module, and a life prediction module. Each standard section of the tower body has a unique corresponding label number, and data calculation, storage, and life prediction are performed on the standard section based on this label number.

[0106] The functions of each server module are as follows:

[0107] The model library and reconstruction module includes a tower crane equipment model library and a 3D model reconstruction submodule. The tower crane equipment model library contains three-dimensional visual kinematic models involving different tonnages, and a single equipment model consists of motion mechanism components and a 3D model of the vehicle body; the 3D model reconstruction submodule is used to reconstruct the tower crane equipment model according to the real-time working condition data of the vehicle obtained by the vehicle equipment end, complete the reorganization and assembly of the tower crane equipment model, and obtain the tower crane 3D twin model; and, based on the real-time working condition data sent by the vehicle equipment end, drive the tower crane 3D twin model to move in real time to achieve movements such as movement, amplitude change, rotation, and lifting.

[0108] The strength calculation module calculates the total load on the upper part of the tower body through the vehicle operating condition information sent in real time by the vehicle equipment end, including the hoisting weight, upper tipping bending moment, wind bending moment and other information; based on the tower body calculation data, tower body structure data and real-time operating conditions, the real-time load and stress borne by each standard section under the current operating conditions are calculated.

[0109] The label marking and recording module includes a label marking submodule and a label database. The label marking submodule is used to establish a matching relationship between the standard section label of the physical tower body and the standard section of the tower crane 3D twin model, and identify the position of the standard section in the tower crane 3D twin model corresponding to each label; the label database is used to record and store the stress data of the standard section corresponding to each label.

[0110] The life prediction module evaluates the remaining life of each standard section based on the historical load data in the tower body label database and the life assessment criteria.

[0111] It should be noted that the life prediction module uses the above-mentioned remaining life assessment method to evaluate the remaining life of each standard section. The implementation methods of the above-mentioned method embodiments are applicable to the twin monitoring system embodiments and can achieve the same or similar technical effects, so they will not be repeated here.

[0112] The above functional modules are completely decoupled and work independently, and a single error will not affect each other.

[0113] The client is the display device, including model-driven display and historical data display. Model-driven display is used to display the 3D twin model action of the tower crane in real time. Historical data display is used to display the number of times each standard section of the tower body has been used in a historical period of time, the load it has borne, and other data.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A tower body life assessment method, characterized in that: include: A tower body label database is established based on the factory labels of the tower body standard sections to store the stress data of each standard section during use; After the tower body is assembled, the factory labels of the tower body standard sections are scanned to identify the label numbers corresponding to the standard sections at different positions, and the tower body assembly sequence is obtained; During the use of the tower body, the stress of the standard nodes at different positions is calculated in real time, and the stress value of the standard node is stored in the standard node corresponding to the tower body tag database based on the tower body assembly sequence; Based on the historical load data of each standard section in the tower body tag database, the remaining life of each standard section is evaluated.

2. A tower body life assessment method according to claim 1, characterized in that: The method further comprises: Each time the tower body standard section changes, the factory label of the tower body standard section is rescanned to obtain the tower body assembly sequence, and the calculated standard section stress value is stored in the standard section corresponding to the tower body label database based on the latest tower body assembly sequence.

3. A tower body life assessment method according to claim 1, characterized in that: The tower body label database stores data using the original label number of each standard section as one page, with the first column of each page being the number of calculations and the second column being the standard section stress.

4. A tower body life assessment method according to claim 3, characterized in that: The storage method of the standard node stress in the tower body label database is: Initially, the default number of calculations for each row is C ni =1, when calculating for the first time, the stress calculation result is stored in the first row and second column as M ni ; During the next calculation, the current stress calculation result is compared with the latest stored stress result to calculate: ， If the calculated value is less than 2%, no separate row is recorded, and only the calculation times of the row where the latest stress storage result is located are added by 1, and the stress storage value remains unchanged; Otherwise, record in the next line the number of calculations and the result of this stress calculation, and so on; Where n represents the original label number of the standard section, i represents the i-th row, C ni Indicates the number of calculations for the i-th row of standard section n, M ni Represents the stress data stored in the i-th row of standard node n.

5. A tower body life assessment method according to claim 4, characterized in that: The remaining life of each standard section is evaluated based on the historical load data of each standard section in the tower body tag database, including: Obtain all stress data calculated during the use of a single standard section from the tower body tag database; For each stress data, query from the pre-configured stress and life correspondence table, and calculate the standard section life value corresponding to the stress by linear interpolation; and obtain the life usage percentage by dividing the service time under the stress by the standard section life value under the stress obtained by looking up the table; Calculate the life usage percentage of a single standard section under all stresses calculated during use, and add up the total life usage percentage of the single standard section, which is recorded as the total damage; The life under the safe allowable stress is obtained from the stress-life correspondence table, which is defined as the equivalent total life of the standard section. The total damage is multiplied by the equivalent total life of the standard section to obtain the converted service life of the standard section. The remaining life of the standard section is obtained by subtracting the converted used time of the standard section from the equivalent total life of the standard section.

6. A tower body life assessment method according to claim 5, characterized in that: The stress and life correspondence table is obtained from the tower crane design standard; In the stress-life correspondence table, the horizontal axis is the stress value, and the vertical axis is the total life of the standard section under the stress.

7. A tower body life assessment method according to claim 5, characterized in that: The calculation method of the usage time under the stress is: In the real-time stress calculation process, the single data transmission time is multiplied by the number of calculations corresponding to the stress in the tower body tag database to obtain the usage time under the stress.

8. A tower body life assessment twin monitoring system, characterized in that: Used to implement the tower body life assessment method according to any one of claims 1 to 7, the system comprises: a vehicle equipment end, a server and a client end, The vehicle equipment end is used to send tower body related data to the server, wherein the tower body related data includes tower body label combination information and vehicle real-time working condition data; The server comprises: The model library and reconstruction module is used to build a 3D twin model of the tower crane and drive the real-time movement of the 3D twin model of the tower crane based on the real-time working condition data sent by the vehicle equipment end to realize the tower crane movement; Strength calculation module, used to calculate the total load on the upper part of the tower in real time, as well as the real-time load and stress borne by each standard section under the current working conditions; The label marking and recording module is used to establish the corresponding relationship between the tower body standard section label and the standard section in the tower crane 3D twin model, and store the standard section stress data; The life prediction module is used to predict the remaining life of the standard section based on the historical load data of the standard section; The client is used to display the movements of the 3D twin model of the tower crane and the historical information of each standard section of the tower body.

9. A tower body life assessment twin monitoring system according to claim 8, characterized in that: The tower body label combination information is the tower body assembly sequence during the use of the tower crane. The tower body assembly sequence means that after the tower body is assembled, the factory labels of the tower body standard sections are scanned to identify the label numbers corresponding to the standard sections at different positions to obtain the tower body assembly sequence; The real-time working condition data of the vehicle include lifting load, boom length, boom amplitude, rotation angle and wind speed data.

10. A tower body life assessment twin monitoring system according to claim 8, characterized in that: The model library and reconstruction module include: Tower crane equipment model library, including 3D visualized tower crane equipment models of different tonnages. A single equipment model consists of motion mechanism parts and a 3D model of the body. The 3D model reconstruction submodule is used to reconstruct the tower crane equipment model according to the real-time operating condition data of the vehicle sent by the vehicle equipment end, complete the reorganization and assembly of the tower crane equipment model, and obtain the 3D twin model of the tower crane; and drive the real-time movement of the 3D twin model of the tower crane based on the real-time operating condition data sent by the vehicle equipment end.

11. A tower body life assessment twin monitoring system according to claim 8, characterized in that: The intensity calculation module is specifically used for: Calculate the total load on the upper part of the tower body based on the real-time vehicle working condition data sent by the vehicle equipment end, including the hoisting weight, upper tipping bending moment and wind bending moment; Based on the tower body calculation data, tower body structure data and real-time working condition data, the real-time load and stress borne by each standard section under the current working condition are calculated.

12. A tower body life assessment twin monitoring system according to claim 8, characterized in that: The label marking and recording module includes: The label marking submodule is used to establish a matching relationship between the label of the physical tower body standard section and the standard section of the tower crane 3D twin model, and identify the position of the standard section in the tower crane 3D twin model corresponding to each label; The label database is used to record and store the stress calculation times and stress data corresponding to each standard section label.

13. A tower body life assessment twin monitoring system according to claim 12, characterized in that: The life prediction module is specifically used for: Obtain all stress data calculated during the use of a single standard section from the tower body tag database; For each stress data, query from the pre-configured stress and life correspondence table, and calculate the standard section life value corresponding to the stress by linear interpolation; and obtain the life usage percentage by dividing the service time under the stress by the standard section life value under the stress obtained by looking up the table; Calculate the life usage percentage of a single standard section under all stresses calculated during use, and add up the total life usage percentage of the single standard section, which is recorded as the total damage; The life under the safe allowable stress is obtained from the stress-life correspondence table, which is defined as the equivalent total life of the standard section. The total damage is multiplied by the equivalent total life of the standard section to obtain the converted service life of the standard section. The remaining life of the standard section is obtained by subtracting the converted used time of the standard section from the equivalent total life of the standard section.

14. A tower body life assessment twin monitoring system according to claim 8, characterized in that: The client comprises: Model-driven display, used to display the actions of the tower crane 3D twin model in real time; Historical data display is used to show the usage times and load bearing data of each standard section of the tower body in the historical time period.

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